Buick Lucerne License Plate Bulb Size

The Buick Lucerne license plate light requires a 194 bulb size for proper installation and function within the rear exterior lighting assembly. Available data covers the production span from 2006 through 2011 for the specified vehicle components.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
2006-2011	194	W5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.	W5W	Check Price

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Additional Notes

The 194 bulb is the specified license plate bulb size for the Buick Lucerne across all available model years, spanning 2006-2011.
The 194 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated specification framework used across the North American automotive market.
It belongs to the T10 miniature wedge bulb family, a form factor characterized by a wedge-shaped base that seats directly into a socket without a separate metal base or pins.
The 194 operates at 12 volts, which is consistent with the standard electrical system voltage found in conventional passenger vehicles.
Its rated wattage of 3.78W places it in the low-power range, reflecting the minimal illumination demand of a license plate application.
The T10 wedge base type is shared by several bulb numbers in the miniature wedge family, meaning physical fitment alone does not confirm electrical compatibility when substituting an alternative bulb.